Say I've got two binary files, each roughly 50MB, that may contain a digitally-identical portion. Is there an easy way to compare these two files, find the longest identical portion, and save that to a file?
(If it matters, the files in question are stream-capture AAC files. They've got some audio boilerplate that sounds identical, but it may or may not be digitally identical. So I've got a two part task: first determine if the boilerplate is digitally identical, second extract the identical portion.)